since you have tried pretty well, here are the steps:
squaring both sides
can you take from here?
I have this problem:
I could use a detail step through process for solving this. I know that p=4 or -44/65
I know that it comes downs to using the quadratic formula or factoring to solve the quadratic equation.
my steps so far have been
if 4/21=(3p-4)/7sqrt(p^2+20) then 4/21*7sqrt(p^2+20)=3p-4
next I get 28sqrt(p^2+20)/21=3p-4
then I multiple both sides be the LCD (3) to eliminate the fraction
I get 4sqrt(p^2+20)=9p-12)
then I need help from here so I fully understand
I know I need to square both sides and factor but I need to know all the steps